MLA

Audubon, John James, 1785-1851. Jackson, Andrew. Box 7, folder 383. 1830 Mar 20. https://collections.library.yale.edu/catalog/33080276.

APA, 6th edition

Audubon, John James, 1785-1851. (["Box 7, folder 383"])(1830 Mar 20)[Jackson, Andrew]. https://collections.library.yale.edu/catalog/33080276.